Cleared Traditional

LIGHT REFLECTION RHEOGRAPHY (K833561) - FDA 510(k) Clearance

Class II Cardiovascular device cleared through predicate-based substantial equivalence - typically does not require clinical trials.

K833561 · Instru-Med, Inc. · Cardiovascular device
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Jan 1985
Decision
454d
Days
Class 2
Risk

K833561 is an FDA 510(k) clearance for the LIGHT REFLECTION RHEOGRAPHY. Classified as Plethysmograph, Photoelectric, Pneumatic Or Hydraulic (product code JOM), Class II - Special Controls.

Submitted by Instru-Med, Inc. (Walker, US). The FDA issued a Cleared decision on January 8, 1985 after a review of 454 days - an unusually long review period, suggesting complex equivalence evaluation.

This device falls under the Cardiovascular FDA review panel, regulated under 21 CFR 870.2780 - the FDA cardiovascular device oversight framework. The Traditional 510(k) pathway establishes clearance through substantial equivalence to a legally marketed predicate device, without requiring clinical trial data.

Device pattern: High-complexity regulatory submission. Elevated predicate reliance profile. The extended review timeline suggests the FDA required additional documentation before confirming substantial equivalence - a pattern common in complex or first-of-kind Cardiovascular submissions.

View all Instru-Med, Inc. devices

Submission Details

510(k) Number K833561 FDA.gov
FDA Decision Cleared Substantially Equivalent - Traditional 510(k) (SESE)
Date Received October 12, 1983
Decision Date January 08, 1985
Days to Decision 454 days
Submission Type Traditional
Review Panel Cardiovascular (CV)
Summary -
Third-party Review No - reviewed directly by FDA
Regulatory Context
Review time vs. panel average
329d slower than avg
Panel avg: 125d · This submission: 454d
Pathway characteristics
Predicate-based equivalence. No clinical trials required.

Device Classification

Product Code JOM Plethysmograph, Photoelectric, Pneumatic Or Hydraulic
Device Class Class 2 - Special Controls
CFR Regulation 21 CFR 870.2780
What this classification means

Class II devices require demonstration of substantial equivalence to a legally marketed predicate device. This pathway does not require clinical trials - it relies on engineering equivalence and performance data. Most Cardiovascular devices follow this clearance model.

Regulatory Peers - JOM Plethysmograph, Photoelectric, Pneumatic Or Hydraulic

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